I assume you're referring to "...exercise our judgment in a vacuum."Can anyone help me to understand the followin idiomatci expression:
"While we do take a long-
term view and maintain a strict investment philosophy, we do not
exercise our judgment in a vacuum."
A vacuum is a space that contains no air (or any other gas). If you do something in a vacuum, you do it in isolation from all the things that might normally have an effect on it.
In the example, although they maintain a strict investment philosophy, they don't ignore other factors that may influence the success of their investments when making decisions. They don't just blindly follow their philosophy; they keep an eye on what's going on in the world and take that into account.